Giovani Lo Celso has signed a contract with Real Betis through to 2023, ending any chance of him returning to Paris Saint-Germain.
A Pablo Sarabia-inspired Sevilla gave their Champions League qualification hopes a boost by squeezing past Real Betis.
Bitter rivals Sevilla and Real Betis face each other on Saturday amid a gripping race for the final Champions League spot in LaLiga.
Sergio Canales had thought playing a senior game for his country would be an unfulfilled dream until his call-up last week.
Real Betis fans rose to acclaim Lionel Messi's brilliance, while Sergio Busquets gets to experience it in training for Barcelona every day.
Antoine Griezmann is reportedly considering his Atletico Madrid future again but Barcelona's Gerard Pique would not be drawn on speculation.
Lionel Messi starred with a hat-trick as Barcelona won 4-1 at Real Betis, with Ernesto Valverde hailing it as a key step towards the title.
Barcelona's 4-1 win at Real Betis in LaLiga on Sunday was marred by a late injury sustained by striker Luis Suarez.
After breaking yet another record as Barcelona won 4-1 at Real Betis, captain Lionel Messi thanked the home fans for their support.
Real Betis dominated possession in Sunday's LaLiga game at home to leaders Barcelona, but still slipped to a 4-1 defeat.